I believe, and I may be wrong, that Font Awesome will be being retired for other (better) alternatives in the "new style"
Incidentally there is nothing to stop you loading version 5 in your extension if you "need" some of the new options.
Remember: You only know what you know and - you don't know what you don't know!
My CDB Contributions | How to install an extension
I will not be accepting translations for any of my extensions in Github - please post any translations in the appropriate topic.
No support requests via PM or email as they will be ignored